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US20090074513 |
OCEAN WATER DRAWING SYSTEM
An ocean water drawing system includes: a well; a working tunnel disposed underground and having an end segment distal from the well; a pipeline unit including a primary pipeline disposed in the...
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US20060105695 |
Anchored mine ventilation structure
A ventilation structure for installation at a mine intersection includes first and second generally parallel side walls. Each side wall is of such height as to wall off at least a portion of a...
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US20100098496 |
TUNNEL MULTI GALLERY
Railway tunnel of circular section with two lines, constructed with tunnel boring machine, having a separating wall, disposed at the middle of the tunnel, and a slab, placed slightly over the...
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US20090136299 |
TUNNEL SUPPORTED ON BEARING BLOCKS
The tunnel supported on bearing blocks is a tunnel to be executed in weak soils, which is constituted by two tubes: an exterior tube, formed by precast elements, which are mounted by a tunnel...
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US20050186032 |
Underwater ambient pressure viewing tunnel system
An aspect of the present invention addresses how to achieve a simple structure, easy and economical to build, that will permit any person, without training or specialized technical equipment, to...
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US20080205989 |
Method for Tunnel Construction
There is provided a method of constructing a section of a half-tunnel in a slope (10) of a mountain or hill (12), including the steps of forming a lock block (18) along the section (16) above the...
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US20120319452 |
Apparatus and method for mining coal
The present invention relates to a novel method of mining underground coal and recovering coal seam gas, the method including locating a seam of coal; digging a mine shaft to reach the seam of...
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US20100319563 |
TRANSPORATION SYSTEM FOR A SUB-SURFACE ACTIVITY AREA
A transportation system comprising means for evacuating personnel from at least one area of activity (16) under a surface (13, 14), where the transportation system comprises at least one transport...
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US20120294680 |
Device and method for anchoring a cable bolt
The invention provides a method for anchoring a cable bolt in a ground formation using a multi-part resin system and an injection adaptor for use in the anchoring method.
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US20100189512 |
APPARATUS AND METHODS FOR UNDERGROUND STRUCTURES AND CONSTRUCTION THEREOF
Described herein are apparatus, systems and methods useful in forming underground vertical structures. Methods are described for constructing an underground vertical structure, comprising the steps...
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